CN203791331U - System for synergistic treatment of municipal domestic waste in cement kiln - Google Patents
System for synergistic treatment of municipal domestic waste in cement kiln Download PDFInfo
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- CN203791331U CN203791331U CN201420135088.3U CN201420135088U CN203791331U CN 203791331 U CN203791331 U CN 203791331U CN 201420135088 U CN201420135088 U CN 201420135088U CN 203791331 U CN203791331 U CN 203791331U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a system for synergistic treatment of municipal domestic waste in a cement kiln and relates to treatment of organic wastes such as the municipal domestic waste. The system comprises a domestic-waste pretreatment system, a steam generation system, a domestic-waste gasification system, a power generation system and a cement production system which are connected by pipelines, wherein a high-temperature air outlet of a grate cooler is respectively communicated with a heat-source inlet of a steam generator and a gasifying-agent inlet of a downdraft type fixed-bed gasification furnace; and a steam outlet of the steam generator is communicated with a steam inlet of the downdraft type fixed-bed gasification furnace, and tail gas of the steam generator is communicated with a heat-source inlet of a drying device. The system disclosed by the utility model has the advantages that since the cement production system and the fixed-bed gasification furnace are utilized for synergistic treatment of the organic wastes such as the municipal domestic waste, not only is the municipal domestic waste treated, but also the problem that the demand for energy is large in cement production can be partially solved, so that the reduction, harmlessness, recycling, reuse and recirculation of waste materials are realized, and the development trend of circular economy is met.
Description
Technical field
The utility model relates to the minimizing of the organic wastes such as a kind of domestic waste, innoxious, recycling treatment, more specifically says the system of utilizing cement production system and fixed-bed gasification furnace to carry out the organic wastes such as associated treatment domestic waste.
Background technology
21 century, the mankind enter kownledge economy, Era of Recycle Economy.Circular Society Construction is just set up using " develop a circular economy " and " in countries in the world " as the important channel of realizing sustainable development, the code of conduct that it is socio-economic activity that recycling economy requires with waste and old material " minimizing, innoxious, resource; re-use, recycles ".
At present, urban garbage disposal mainly contains four kinds of processing methods:
1, landfill
So-called sanitary landfills, the land-fill method that can control percolate and landfill gas exactly.Still there are a lot of problems in design, construction and the operation of most of landfill yards, shows: design concept is relatively backward, and landfill utilization rate is low, and the contamination accident of underground water, surface water constantly occurs; Landfill gas is processed with utilizing system and has just been started development, causes greenhouse effects, produces stench.
2, compost
The remaining biodegradable component that waits in kitchen that the composting plant of China is mainly processed in mixed consumer waste becomes farmland fertilizer, its limitation is mainly manifested in: collect because China does not also carry out general categorized consumer waste at present, therefore enter in factory's rubbish, to contain the multiple non-degradable components such as stone, metal, glass, plastics and need otherwise processed.
3, burn
Waste incineration has the advantages such as minimizing is remarkable, innoxious more thorough and recyclable waste incineration waste heat, has following defect: China's house refuse moisture content is high, and calorific value is low but burn composting, needs more auxiliary fuel, finally causes burning cost and rises.Burning is to make house refuse oxygen-excess combustion, and exhaust gas volumn is large, and intractability is large.China is at present except the more flourishing city of minority economy, and the mixed consumer waste calorific value in other city is low, and dregginess is high, is not suitable for burning; On the other hand, because rubbish from cooking in China's composting is more, salt content is higher, and HCl can corrode incinerator, has also increased difficulty and the cost of polluting control of flue gas processing.In burning process, produce bioxin problem, be difficult to solve.
4, gasification
Domestic garbage gasification is organic principle in house refuse to be reacted under reducing atmosphere to the process that generates flammable synthesis gas with gasifying agent.Whole gasification is divided into pyrolysis phase, oxidation stage and reduction phase.In pyrolytic process, after being heated, macromolecule organic is decomposed into the organic compound of low carbon chain, and wherein a part of volatile matter exists with gaseous form at normal temperatures, and there is dehydration polymerisation generation tar in some also.The volatile matter that pyrolysis phase produces can with the oxygen generating gasification combustion reaction that passes into gasification reactor, the temperature of this gasification reaction system raises rapidly in stage, material just enters reduction phase by zoneofoxidation later, the CO that pyrolysis and oxidation stage produce
2the fixed carbon of not participating in reaction further reacts and forms CO, is also accompanied by H simultaneously
2o and CO
2, CO reaction forms CH
4deng other reaction.
The gasification reacting furnace using in domestic waste gasification mainly contains fixed-bed gasification furnace and fluidized-bed gasification furnace.
Fixed bed gasification technology is comparatively ripe, the difference of flow direction in bed according to garbage raw material and gasifying medium, and fixed-bed gasification furnace can be divided into two kinds of updraft type and downdrafts.
The operation principle of downdraft fixed-bed gasification furnace: house refuse is at first at dry section, be subject to the heat radiation of cracking zone and zoneofoxidation, after evaporating moisture, along with the consumption of material enters cracking zone under Action of Gravity Field, the gas of volatile matter starts output, and dry house refuse is decomposed into charcoal, volatile matter and tar etc. gradually.Along with the consumption of material, under the effect of gravity and micro-negative pressure, the charcoal of generation, volatile matter and tar etc. enter zoneofoxidation.Gasifying agent adds in zoneofoxidation, reacts and generates CO with charcoal, volatile matter and tar etc.
2, CO etc., and emit a large amount of heats.The charcoal not ruing out of etc. continues to move down into reducing zone,, a series of reduction reaction occurs here, generates CO, H
2and CH
4deng, lime-ash is arranged in ash entrance chamber.The operation principle of downdraft fixed-bed gasification furnace has determined that its adaptability to raw material is good, can process the house refuse that moisture is higher, granularity is larger, and can move continuously, and Operation and Maintenance is simple.
In downdraft fixed-bed gasification furnace, air-flow flows downward, thereby the water vapour generating at dry section, the CO decompositing in cracking zone
2, CO, H
2there is redox reaction with the thermal current such as the tar gasification zone of flowing through downwards.There is cracking and become fuel gas in tar, therefore, the flow rate that downdraft fixed-bed gasification furnace produces is relatively high when by zoneofoxidation, and tar is less, and energy utilization rate is high.
In above urban garbage disposal, burning refers to that completing combustion is to ash, air in incinerator and the ratio of fuel are higher, be enough to be oxidized garbage raw material, in gasifying process, in the synthesis gas that incomplete thermal response produces, contain the energy in garbage raw material, use in gas turbine, internal combustion engine and this synthesis gas can be used as fuel, also can be used as industrial chemicals.Gasification installation is more much smaller than incinerator, and this is because the gas flow that produces of gasification accounts for 1/4 of exhaust gas volumn that completing combustion is produced, and required electrostatic precipitator or other cleaning equipment, cooling device are corresponding all much smaller.
Visible gasification process is more superior than methods such as burning, landfills, but gasification is high in the face of China's house refuse moisture content equally, and calorific value is low, needs the problems such as auxiliary fuel, broken difficulty are large, tar processing, lime-ash processing, leachate treatment, gas purification.
On the other hand, cement industry a large amount of successfully practices in Europe fully showed already, utilizing existing cement plant to process municipal refuse is environmental protection the most effective most economical technology path, the processing of domestic waste and cement production process are effectively combined, directly utilize existing new type dry kiln production process, both processed domestic waste, and can partly solve again the great demand problem of cement industry to the energy, its meaning is self-evident.
The advantage of cement rotary kiln associated treatment house refuse is:
(1) can to sell the refuse kind of receiving many, applied widely for cement industry.No matter be solid or liquid, block, granular or paste, household waste, hazardous waste or toxic waste can be burnt totally in cement kiln or predecomposition furnace.
(2) cement consumption and production scale are very large, and cement kiln unit production capacity is high, and therefore cement industry is huge to the pin amount of receiving of various refuses, and development potentiality is considerable.
(3) ash content after waste incineration or gasification participates in the formation reaction of grog, and wherein heavy metal enters in clinker by solid phase and liquid phase reactor, is all cured in grog lattice.In cement concrete, these heavy metal elements are strapped in the lattice of clinker, due to extremely difficult leaching, can not cause secondary pollution, and this is proved by a large amount of tests.
(4) waste gas in garbage processing procedure and flue gas all enter quality coal in cement kiln systems, owing to therefore greatly having saved the equipment investments such as useless vent gas treatment; Incineration gases temperature is at 1700～1800 DEG C in rotary kiln, and in high temperature and longer time of staying situation, in discarded object, the composition such as poisonous and hazardous phenyl ring thoroughly decomposes ， bioxin and substantially do not exist; The full vacuum operation of rotary cement kiln system, efficient dust collecting system and time grey cyclic utilization system have ensured the Collection and use of harmful dust, make waste gas realize safety dumping.
The advantage that above-mentioned cement rotary kiln has in the time processing domestic waste is all to carry out with the technical process of manufacture of cement simultaneously, that is to say, rotary cement kiln system is not being carried out to, under the condition of large equipment adjustment, can utilize existing rotary cement kiln system to carry out the processing of house refuse.
Cement kiln associated treatment house refuse present situation:
1, sorting consumer waste goes out combustible, and combustible is broken into powder, is transported to kiln hood or kiln tail burner combustion through wind-force.Sorting and the broken link requirement of the method to house refuse is very high, and China's domestic waste complicated component is difficult to implement.
2, be parallel to tertiary-air pipe swinging incinerator is set cement rotary kiln is other, the combustion air in using the hot blast of cooling clinker as incinerator, the flue gas after burning is got back to tertiary-air pipe and is entered dore furnace.Incinerator hot blast trend moves towards identical with rubbish material.The percolate that garbage storing pond produces and part are stored up pond foul smell and are sprayed into tertiary-air pipe.In the method, garbage leachate directly enters tertiary-air pipe, meets high temperature and expands rapidly, manufacture of cement is had to considerable influence, the bad control of process.
3, house refuse is first passed through sorting fragmentation after entering factory, then carries out microorganism fermentation mummification, makes rubbish RDF(garbage derivatived fuel), enter cement kiln utilization.The foul smell that rubbish pretreatment produces discharges after biological deodorizing, and percolate sprays into high-temperature process in kiln.The method technical process is more complicated, and the noncombustibles after sorting is not used, and otherwise processed; In RDF manufacturing process, adding the coal of high heating value, is also to use fossil fuel disposal of refuse.
4,, with the fluidization rubbish that gasifies, synthesis gas leads to firing system burning, shortcoming: require high to sorting consumer waste, fragmentation, production process is difficult to be controlled, do not use cement plant waste heat, do not solve the problem that refuse moisture is high, calorific value is low, adaptability to raw material is lower.
Comprehensive above analysis, in the processing of industry and domestic waste and manufacture of cement, the demand of the energy being combined, both industry and domestic waste had been processed, can partly solve again the great demand problem of manufacture of cement to the energy, " minimizing, innoxious; resource; to re-use, recirculation " that realize waste and old material is development trend, is necessary to seek more effective cooperative processing method.
Utility model content
The purpose of this utility model is the defect that overcomes prior art, and a kind of system of cement production system associated treatment domestic waste of energy-conserving and environment-protective is provided.
Realizing the technical solution of the utility model is:
A system for cement plant associated treatment domestic waste, comprises each system that following pipeline connects:
House refuse pretreatment system, it comprises the rubbish heap canopy, garbage sorting device, drying device and the breaker that use in order;
Domestic garbage gasification system, it comprises the downdraft fixed-bed gasification furnace and the gas cleaning plant that use in order;
Cement production system, it comprises raw material predecomposition device, kiln tail smoke-box, rotary kiln, grate-cooler and emission-control equipment; Also comprise:
Steam generating system, it comprises the effluent treatment plant and the steam generator that use in order;
Wherein, the outlet of the high temperature air of grate-cooler is communicated with respectively steam generator thermal source entrance, downdraft fixed-bed gasification furnace gasification agent inlet; The steam (vapor) outlet of steam generator is communicated with the steam inlet of downdraft fixed-bed gasification furnace, and the tail gas of steam generator is communicated with the thermal source import of drying device.
Further, in the system of described cement plant associated treatment domestic waste:
The drop liquid outlet of oozing of rubbish heap canopy is communicated with effluent treatment plant water inlet; The outlet of breaker is communicated with the material inlet of downdraft fixed-bed gasification furnace; Raw material predecomposition device is led to respectively in the dirt outlet of garbage sorting device and the ashes outlet of downdraft fixed-bed gasification furnace.
The flammable syngas outlet of downdraft fixed-bed gasification furnace is communicated with the entrance of gas cleaning plant.
The garbage leachate outlet of rubbish heap canopy is communicated with effluent treatment plant, and join the mouth of a river is from the beginning communicated with steam generator water inlet to the delivery port of effluent treatment plant outward with another.
Organic combustible outlet, drying garbage device, breaker and the downdraft fixed-bed gasification furnace of garbage sorting device are communicated with successively;
The system of described cement plant associated treatment domestic waste, also comprises electricity generation system, and electricity generation system comprises the gas turbine and the generating set that use in order; The flammable syngas outlet of downdraft fixed-bed gasification furnace is communicated with gas turbine, and the tail gas of gas turbine is communicated with the thermal source import of drying garbage device.
Described domestic garbage gasification system also comprises tar cracking device, the tar outlet of gas cleaning plant is communicated with this tar cracking device, the thermal source import of tar cracking device is communicated with the high temperature air outlet of grate-cooler, and the coke tar cracking gas outlet of tar cracking device is communicated with gas turbine.
Gas turbine drives generating set, and generating set connects the power-equipment of cement production system.
In the system of described cement plant associated treatment domestic waste, the organic sludge outlet of effluent treatment plant is communicated with kiln tail smoke-box.
Grate-cooler entrance is communicated with respectively foul smell outlet and the drying device waste gas outlet of rubbish heap canopy, and the high temperature air outlet of grate-cooler is communicated with respectively the thermal source import of thermal source entrance, downdraft fixed-bed gasification furnace gasification agent inlet and the tar cracking device of steam generator.
Adopt above scheme, the utility model has solved the difficult problems such as the moisture in garbage disposal is high, difficult fragmentation, has effectively processed solid waste, waste gas, waste water, the electric energy back feeding cement system again of generation.
The system of cement production system associated treatment domestic waste provided by the utility model, cement production system and downdraft fixed bed gasification are system coupled, can process the house refuse that moisture content is high, can reduce broken difficulty, and can make tar, lime-ash, leachate treatment all obtain integrated treatment, energy and resource in governance process are recycled.The utility model organically combines cement production system and domestic garbage treating system, do not affect cement normal produce and the prerequisite of clinker quality under associated treatment domestic waste.This system, for the feature of China's house refuse, is utilized downdraft fixed bed gasification technology, reduces the moisture of house refuse by the part of waste heat of cement firing system, improve the efficiency of gasification, adaptability to raw material is good, has solved tar and has processed a difficult problem, not only makes solid waste, waste gas, waste water obtain utilization, the electric energy producing can be used for again cement production system, realize " minimizing, innoxious, resource; re-use, recycles " of waste and old material.
Brief description of the drawings
Fig. 1 is process chart of the present utility model;
Fig. 2 is the basic comprising figure of the utility model cement plant associated treatment system for urban domestic refuse;
Fig. 3 is downdraft fixed-bed gasification furnace schematic diagram.
Detailed description of the invention
Illustrate detailed description of the invention of the present utility model below in conjunction with accompanying drawing, but the content that is not limited to enumerate in embodiment.
Referring to Fig. 1 and Fig. 2, the system of the utility model cement plant associated treatment domestic waste, comprise rubbish heap canopy 11 by the house refuse pretreatment system 1(by pipeline connection, garbage sorting device 12, drying device 13, breaker 14 etc.), steam generating system 2(comprises effluent treatment plant 21, steam generator 22 etc.), domestic garbage gasification system 3(comprises downdraft fixed-bed gasification furnace 31, gas cleaning plant 32, tar cracking device 33 etc.), electricity generation system 4(comprises gas turbine 41, generating set 42 etc.), cement production system 5(comprises raw material predecomposition device 51, kiln tail smoke-box 52, rotary kiln 53, grate-cooler 54, emission-control equipment 55 etc.) composition.Wherein:
The drop liquid outlet of oozing of rubbish heap canopy 11 is communicated with effluent treatment plant 21 water inlets; Raw material predecomposition device 51 is led in the dirt outlet of garbage sorting device 12; The outlet of breaker 14 is communicated with the material inlet of downdraft fixed-bed gasification furnace 31, the steam (vapor) outlet of steam generator 22 is communicated with the steam inlet of downdraft fixed-bed gasification furnace 31, and the high temperature air outlet of grate-cooler 54 is communicated with the air intake of downdraft fixed-bed gasification furnace 31; The flammable syngas outlet of downdraft fixed-bed gasification furnace 31 is communicated with the entrance of gas cleaning plant 32, and raw material predecomposition device 51 is led in the ashes outlet of downdraft fixed-bed gasification furnace 31; The tail gas of steam generator 22 passes into drying device 13, the foul smell of the waste gas of drying device 13 and rubbish heap canopy 11 leads to the entrance of grate-cooler 54, and steam generator 22, downdraft fixed-bed gasification furnace 31 and tar cracking device 33 are led to respectively in the high temperature air outlet of grate-cooler 54.
In conjunction with Fig. 1-Fig. 3, utilize the utility model system to carry out cement plant associated treatment domestic waste, can be by following flow process: domestic waste enters the laggard windrow ferment of rubbish heap canopy 11 3～5 days, can make refuse moisture reduce, by pipeline, (in the utility model, gaseous material uses air delivering pipeline to the foul smell G1 producing during this time, lower same.In Fig. 1 and Fig. 2, dotted line represents) transport to the grate-cooler 54 of cement production system 5, rubbish heap canopy 11 keeps negative pressure, and the high temperature in grate-cooler 54 can effectively be removed the harmful components in foul smell G1, by pipeline, (in the utility model, liquid uses infusion pipeline to the garbage leachate L1 that the interior rubbish heap ferment of heap canopy 11 produces, transport to effluent treatment plant 21 down together), after supernatant L2 after purification and running water proportioning, transport to steam generator 22, in steam generator 22 with from G2-1(800 DEG C of left and right of part high temperature air of grate-cooler) heat exchange produces 150 DEG C of left and right steam G3(steam G3 and jointly transports to downdraft fixed-bed gasification furnace 31 as the gasifying agent of refuse gasification system 3 from the part high temperature air G2-2 of grate-cooler), the organic sludge S1 that effluent treatment plant 21 purification process produce is by pipeline or belt (solid matter use conveying pipeline or Belt Conveying in the utility model, transport to kiln tail smoke-box 52 Pintsch process down together), the tail gas G4 that steam generator 22 produces transports to the moisture of drying garbage device 13 in order to further reduction house refuse as a part of thermal source.
House refuse after rubbish heap canopy 11 heap ferment enters that garbage sorting device 12 sub-elects more than organic combustible, kitchen, dirt, metal, glass etc., and wherein more than kitchen, entering composting device carries out compost treatment; The Recyclable such as metal, glass recycles; After the common fragmentation of dirt S2 and raw-meal ingredient, enter the raw material predecomposition device 51 of cement production system 5; Garbage sorting device 12 preferably carries out sorting and sorting (chlorine-bearing compound otherwise processed) to the chlorine-bearing compound in house refuse, and in the organic combustible that makes to sub-elect, content of Cl element is less than 0.025%(mass percent); The thermal source that organic combustible S3 that garbage sorting device 12 sub-elects transports to drying garbage device 13(drying device 13 is the tail gas G4 of steam generator 22 and the tail gas G5 of gas turbine) enter breaker 14 after being dried and carry out break process, make the organic combustible S3 particle diameter after fragmentation be less than 5cm, moisture is less than 25%(by quality); The waste gas G6 of drying device 13 transports to grate-cooler 54, utilizes high temperature effectively to remove pernicious gas wherein.
To be dried, organic combustible S3(after fragmentation is from garbage sorting device 12) be delivered to and in the downdraft fixed-bed gasification furnace 31 in refuse gasification system 3, make gasification process (this kind of gasification furnace operation principle is shown in Fig. 3, its adaptability to raw material is good, can process high-moisture, the house refuse that particle diameter is large, Operation and Maintenance is simple and can move continuously, and the flammable flow rate that gasification produces is higher, tar content is few), the gasifying agent of downdraft fixed-bed gasification furnace 31 is from the steam G3 of steam generator 22 with from the part high temperature air G2-2 of grate-cooler 54, in gasification furnace 31 organic combustible S3 with from the steam G3 of steam generator 22 with from the part high temperature air G2-2 generating gasification combustion reaction of grate-cooler 54 (water vapour G3 add the calorific value that can improve flammable synthesis gas), wherein high temperature air excess coefficient is 0.2～0.4, water vapour and flammable organic matter be preferably 0.3～0.5:1 of 0.2～0.8:1(in mass ratio) adjust flux, (catalyst can be nickel-base catalyst in gasification, to add catalyst, dolime, quick lime etc.).As improvement, the gasifying agent of gasification can also be gaseous mixture of air, oxygen-enriched air, pure oxygen and they and water vapour etc.
The flammable synthesis gas G7 that downdraft fixed-bed gasification furnace 31 gasifications produce enters the gas turbine 41 of electricity generation system 4 after gas cleaning plant 32 is isolated tar, isolated tar L3 transports to and in tar cracking device 33, carries out catalytic pyrolysis, in tar cracking device, add catalyst (catalyst can be dolomite, base metal catalysts, nickel-base catalyst etc.), thermal source is that the coke tar cracking gas G8 producing after the catalyzed cracking of tar L3 transports to the gas turbine 41 of electricity generation system 4 from the high temperature air G2-3 of 800 DEG C of left and right of part of grate-cooler 54; The ashes S4 that downdraft fixed-bed gasification furnace 31 gasifications produce transports to the raw material predecomposition device 51 of cement production system 5.
The gas turbine 41 pushing generator groups 42 of electricity generation system 4 generate electricity (fuel of gas turbine is from the flammable synthesis gas G7 of refuse gasification system 3 and coke tar cracking gas G8), the high-temperature tail gas G5 that gas turbine 41 produces transports to drying garbage device 13, and the electric energy that generating set 42 produces is for the power-equipment of cement production system 5.
Raw material and from the dirt S2 of garbage sorting device 12 and carry out entering after proportioning cement production system 5(from the ashes S4 of downdraft fixed-bed gasification furnace 31 and be less than 0.025% in order not affect chlorine element mass content in the flammable organic matter of service requirement of cement production system, the overall control that lime-ash S2 and S4 mix raw material be less than raw material gross mass 5%), successively by raw material predecomposition device 51, kiln tail smoke-box 52, the rear generation high temperature chamotte of rotary kiln 53 S5 enters grate-cooler 54, high temperature chamotte S5 in grate-cooler 54 and normal temperature air and carry out producing high temperature air G2 after heat exchange from foul smell G1 and the drying device 13 waste gas G6 of rubbish heap canopy 11, the high temperature air G2 producing transports to respectively steam generator 22 (G2-1), downdraft fixed-bed gasification furnace 31 (G2-2), tar cracking device 33 (G2-3), in cement production system, install 51-54 produce waste gas G9 after emission-control equipment 55 as purify after exhaust gas evacuation.
Adopt this system and method good to domestic waste adaptability to raw material, on former cement production system without impact.By drying garbage device 13, the moisture of the organic combustible S3 in house refuse is reduced aborning, improved the efficiency of organic combustible S3 gasification; Downdraft fixed-bed gasification furnace 31 can be accepted larger raw material particle size, and garbage crushing device 14 investments are reduced; In downdraft fixed-bed gasification furnace 31 gasifications, producing tar in flammable synthesis gas can be separated and make it be cracked into coke tar cracking gas to pass into gas turbine and be utilized effectively; Lime-ash (dirt S2 and ashes S4) in rubbish, ooze drop liquid L1 and all obtain integrated treatment, the flammable synthesis gas G7 that in house refuse, organic combustible S3 produces through 31 gasifications of downdraft fixed-bed gasification furnace is for generating, the electric energy producing is used for manufacture of cement as power again, and energy and resource in house refuse governance process are recycled.
Claims (10)
1. a system for cement plant associated treatment domestic waste, comprises each system that following pipeline connects:
House refuse pretreatment system, it comprises the rubbish heap canopy, garbage sorting device, drying device and the breaker that use in order;
Domestic garbage gasification system, it comprises the downdraft fixed-bed gasification furnace and the gas cleaning plant that use in order;
Cement production system, it comprises raw material predecomposition device, kiln tail smoke-box, rotary kiln, grate-cooler and emission-control equipment; It is characterized in that, also comprise:
Steam generating system, it comprises the effluent treatment plant and the steam generator that use in order;
Wherein, the outlet of the high temperature air of grate-cooler is communicated with respectively steam generator thermal source entrance, downdraft fixed-bed gasification furnace gasification agent inlet; The steam (vapor) outlet of steam generator is communicated with the steam inlet of downdraft fixed-bed gasification furnace, and the tail gas of steam generator is communicated with the thermal source import of drying device.
2. the system of cement plant associated treatment domestic waste according to claim 1, is characterized in that, the drop liquid outlet of oozing of rubbish heap canopy is communicated with effluent treatment plant water inlet; The outlet of breaker is communicated with the material inlet of downdraft fixed-bed gasification furnace; Raw material predecomposition device is led to respectively in the dirt outlet of garbage sorting device and the ashes outlet of downdraft fixed-bed gasification furnace.
3. the system of cement plant associated treatment domestic waste according to claim 2, is characterized in that, the flammable syngas outlet of downdraft fixed-bed gasification furnace is communicated with the entrance of gas cleaning plant.
4. the system of cement plant associated treatment domestic waste according to claim 3, it is characterized in that, the garbage leachate outlet of rubbish heap canopy is communicated with effluent treatment plant, and join the mouth of a river is from the beginning communicated with steam generator water inlet to the delivery port of effluent treatment plant outward with another.
5. the system of cement plant associated treatment domestic waste according to claim 4, is characterized in that, organic combustible outlet, drying garbage device, breaker and the downdraft fixed-bed gasification furnace of garbage sorting device are communicated with successively.
6. the system of cement plant associated treatment domestic waste according to claim 4, is characterized in that, also comprise electricity generation system, it comprises the gas turbine and the generating set that use in order; The flammable syngas outlet of downdraft fixed-bed gasification furnace is communicated with gas turbine, and the tail gas of gas turbine is communicated with the thermal source import of drying garbage device.
7. the system of cement plant associated treatment domestic waste according to claim 6, it is characterized in that, described domestic garbage gasification system also comprises tar cracking device, the tar outlet of gas cleaning plant is communicated with this tar cracking device, the thermal source import of tar cracking device is communicated with the high temperature air outlet of grate-cooler, and the coke tar cracking gas outlet of tar cracking device is communicated with gas turbine.
8. the system of cement plant associated treatment domestic waste according to claim 7, is characterized in that, gas turbine drives generating set, and generating set connects the power-equipment of cement production system.
9. the system of cement plant associated treatment domestic waste according to claim 3, is characterized in that, the organic sludge outlet of effluent treatment plant is communicated with kiln tail smoke-box.
10. according to the system of the arbitrary described cement plant of claim 1 to 9 associated treatment domestic waste, it is characterized in that, grate-cooler entrance is communicated with respectively foul smell outlet and the drying device waste gas outlet of rubbish heap canopy, and the high temperature air outlet of grate-cooler is communicated with respectively the thermal source import of thermal source entrance, downdraft fixed-bed gasification furnace gasification agent inlet and the tar cracking device of steam generator.
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| CN105689360A (en) * | 2016-03-03 | 2016-06-22 | 中冶东方工程技术有限公司 | System and technology utilizing converter gas for gasifying household refuse to achieve incineration and power generation |
| WO2016112735A1 (en) * | 2015-01-14 | 2016-07-21 | 江苏鹏飞集团股份有限公司 | System for co-processing household solid waste in cement kiln and method thereof |
| CN105903752A (en) * | 2016-06-16 | 2016-08-31 | 北京神雾环境能源科技集团股份有限公司 | Household garbage treatment system and method |
| CN105903753A (en) * | 2016-06-16 | 2016-08-31 | 北京神雾环境能源科技集团股份有限公司 | Household garbage treatment system and method |
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